function trim(str, pos = 'both') {
  if (pos == 'both') {
    return str.replace(/^\s+|\s+$/g, '')
  } else if (pos == 'left') {
    return str.replace(/^\s*/, '')
  } else if (pos == 'right') {
    return str.replace(/(\s*$)/g, '')
  } else if (pos == 'all') {
    return str.replace(/\s+/g, '')
  } else {
    return str
  }
}

export default trim
